jQuery addClass example

Change class name on click in jQuery

HTML

<div class="cricles">
  <span>32</span>
  <span class="text">Длинное слово</span>
  <span class="text">Слово</span>
</div>

CSS

body {
  background: #fff;
  padding: 20px;
  font-family: sans-serif;
}

.cricles::after {
  content: '';
  display: block;
  clear: both;
}

.cricles> span {
  display: block;
  position: relative;
  float: left;
  min-width: 32px;
  height: 32px;
  border: 1px solid #999;
  text-align: center;
  line-height: 34px;
  margin: 0px 20px 0px 0px;
  border-radius: 100px;
  overflow: hidden;
}

.cricles> span.text {
  padding: 0px 13px;
}

.cricles> span::after {
	content: '';
	display: block;
	width: 100%;
	height: 1px;
	background: red;
	position: absolute;
	top: 50%;
	left: 0px;
	transform: rotate(-45deg);
}

.cricles> span.text::after {
	transform: rotate(-15deg);
}

JavaScript

// find elements
var banner = $("#banner-message")
var button = $("button")

// handle click and add class
button.on("click", function(){
  banner.addClass("alt")
})